Improvement in steam-generators



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JOB A. DAVIS, or WATERTOWN, NEW YORK.

Letters Patent No. 83,608, dated November 3, 1868.

IMPROVEMENT 11v sTEAM-eENERA'ro s.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, J OB A. DAVIS, ofWatertown, in the county of Jefferson, and State of N ew York, haveinvented certain new and useful Improvements in Steam- GeneratingApparatus; and I do hereby declare that the following is a full, clear,and exact description thereof, and of its mode or manner of operation,reference being hadto the accompanying drawings, and to the letters ofreference marked thereon, and making a part of this specification.

It is often very desirable, and particularly for the purpose of cookingby steam, to generate steam from a small quantity of water, and by meansof but little fire, or from the burning of a simple lamp. It is, ofcourse, an easy matterto generate steam by the use or combustion of alittle fuel, provided a proportionate small quantity of water issubjected to the heat generated but with such a small'body of water thatit can be quickly converted into steam with a little fire, a fieshsupply of water has often to be furnished, and this replenishing of thewater necessarily reduces the temperature of the steam-generator, and anew consumption of fuel is again required to raise the water to theboiling-point.

My invention consists in a cheap, simple, and efi'ective apparatus, bywhich a very small body of water may be subjected to the direct actionof any fire or lamp, and steam be thus produced quickly, and at butlittle expense, and by which, also, a constant supply of water isfurnished to the steam-generator, but without reducing the temperatureof the boiler, or interrupting the generation of the steam materiall'y.

Figure l is a perspective View of my improved steamgenerator. 4

Figure 2 is a verticalsection of the same' The cylinder A is a thin ironor tinportablevessel,

having a fire-grate, B, in its lower end, and having extending upthrough the water-;-

Near its bottom are fixed a tube and stop cock, D, for drawing off thewater when desired, and from the top the steam is conducted by a pipe,E, for use in cooking, or for other purposes; i

In such vessel, A, thefire-surface is large, compared with theWater-surface, so as to securea rapid generation of steam from thecombustion of but little fuel, or even by the use of an ordinary lamp orgas-j et.

Such vessel can be made of light metal, since, for ordinary purposes, ascooking, heating rooms, 850., the steam need not be retained thereinunder pressure, but passes off freely through the pipe E.

Connecting with such steam-generating vessel A is water to be easilypoured therein, and covered with a loose top, G, and which communicateswith the vessel A by means of and through the pipe H.

It-being a natural law of fluids, that they will 'rise to or be at thesame level, in vessels connecting with each other, whatever theirrelative capacity and shape, the water in the steam-generator A and in asupply fromF will flow into A just as fast as, and only as fast as thewater in A is converted into steam and passes oii. And as this supply iscontinual, and not in large, but in small quantities, there will not beany sensible reduction of the temperature by reason of such supply, norany intermission or cessation in the, generation of the steam;

The supply-reservoir E may be of any convenient size, and soproportioned to the steam-generator A as to supply the latter for agiven length of time, without such reservoir requiring to be filled.

For cooking-purposes, particularly in warm weather, this apparatus willbe found not only convenient, but very economical in its operation, andit canalso be applied to very many uses where steam is desired and butlittle pressure required.

.by Letters Patent, is-

supply reservoir F, =whereby to generate low pressure of steam, and tosupply heated water to the boiler,

substantially as herein set forth.

1 JOB A. DAVIS.

Witnesses:

L. H. Arnswonrn, J OHN H. NAPIER.

a water-vessel, F, whichis open at the top, to permit the reservoir Fwill always be at the same height, and

What I claim as my invention, and desire to secure.

The combination of the generator Aand the water-

